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Durbas A, Subramanian T, Simon C, Allen MRJ, Samuel J, Colón LF, Mazzucco MR, Pagan C, Karasavvidis T, Vigdorchik J, Cunningham ME, Kim HJ, Lovecchio FC. Evaluating Variations in Spinopelvic Parameters from Sitting to Standing: A Comparative Analysis of 1447 Older Adults Across Age, BMI, and Gender Subgroups. J Clin Med 2025; 14:2952. [PMID: 40363985 PMCID: PMC12072520 DOI: 10.3390/jcm14092952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2025] [Revised: 04/20/2025] [Accepted: 04/22/2025] [Indexed: 05/15/2025] Open
Abstract
Background/Objectives: Sagittal spinal alignment goals for adult spinal deformity (ASD) surgery are predominantly derived from standing radiographs, despite the biomechanical relevance of sitting posture. Existing studies on sitting alignment involve young, healthy cohorts, which poorly represent ASD patients. This study assessed posture-dependent changes in spinopelvic parameters, including pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), and lumbar lordosis (LL), and examined how age, BMI, and gender influence these changes. Methods: In this retrospective cohort study, sitting and standing lateral radiographs of 1447 patients were evaluated. Spinopelvic parameters were measured, and changes (ΔPI, ΔPT, ΔSS, and ΔLL) were calculated. Multiple regression analysis was used to determine associations between these changes and age, BMI, and gender. Results: All parameters differed significantly between positions (p < 0.001); PT and PI increased in sitting (ΔPT = -19.20°; ΔPI = -4.52°), while SS and LL increased in standing (ΔSS = 14.67°; ΔLL = 18.44°). Older age correlated with increased ΔPT (p < 0.001) and ΔPI (p = 0.049) but reduced ΔLL and ΔSS (p < 0.001). Higher BMI was associated with decreased ΔPI, ΔPT, and ΔLL (p < 0.001, 0.003, and 0.025). Females showed greater ΔPT (p = 0.013) but smaller ΔPI, ΔSS, and ΔLL (p = 0.043, <0.001, and 0.001). Conclusions: Spinopelvic parameters vary significantly between sitting and standing positions, affected by age, BMI, and gender. The observed PI change suggests SIJ involvement, highlighting the need for posture-specific and demographic-adjusted alignment goals in ASD surgery to optimize outcomes.
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Affiliation(s)
- Atahan Durbas
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Tejas Subramanian
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
- Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA
| | - Chad Simon
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Myles R. J. Allen
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Justin Samuel
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Luis Felipe Colón
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Michael R. Mazzucco
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
- Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA
| | - Cale Pagan
- Department of Hip and Knee Replacement Surgery, Hospital for Special Surgery, 535 E 71st St, New York, NY 10021, USA
| | - Theofilos Karasavvidis
- Department of Hip and Knee Replacement Surgery, Hospital for Special Surgery, 535 E 71st St, New York, NY 10021, USA
| | - Jonathan Vigdorchik
- Department of Hip and Knee Replacement Surgery, Hospital for Special Surgery, 535 E 71st St, New York, NY 10021, USA
| | - Matthew E. Cunningham
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Han Jo Kim
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
| | - Francis C. Lovecchio
- Department of Spine Surgery, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021, USA (F.C.L.)
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Ouchida J, Nakashima H, Ohara T, Machino M, Ito S, Segi N, Yamauchi I, Imagama S. Patterns of sitting spinal alignment in non-ambulatory scoliosis patients with paraplegia: an observational study. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2025; 34:556-564. [PMID: 39611971 DOI: 10.1007/s00586-024-08584-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 10/17/2024] [Accepted: 11/22/2024] [Indexed: 11/30/2024]
Abstract
PURPOSE To classify sagittal spinopelvic alignment patterns of non-ambulatory scoliosis patients with paraplegia based on lateral sitting radiographs and explore their relation to clinical background and physical function. METHODS We reviewed non-ambulatory scoliosis patients with paraplegia, excluding those with prior spinal surgery from a single-center database. Alignment patterns in sitting postures were classified into slump sitting (SS) and erect sitting (ES) based on the most posterior edge of the spine's location on lateral sitting radiographs. Radiographical spinopelvic sagittal alignment, demographics, and physical functions were analyzed. Clinical scoring for physical functions included Hoffer's ambulator classification, Hoffer's modified sitting classification, and the Modified Ashworth Score (MAS) for the severity of spasticity in the lower extremities. Percentages of patients without spasticity, with MAS of 0 indicating "no spasticity." were also compared between the two alignment patterns. RESULTS Of 172 patients screened, 86 met inclusion criteria, revealing two distinct alignment patterns: SS showed greater thoracic kyphosis, smaller lumbar lordosis, pelvic retroversion, and hip hyperflexion compared to ES. No significant differences in demographic data or curve patterns were observed between groups. The SS group had a significantly higher percentage of patients without spasticity compared to the ES group (39.2% vs. 14.3%, P = 0.016). CONCLUSION Identified were two distinct sagittal alignment patterns in seated scoliosis patients with paraplegia, with potential influences from spasticity in the lower extremities. Recognizing these patterns can aid in assessing the function of sitting balance that includes the hip joint and in optimizing strategies for the treatment of scoliosis patients with paraplegia.
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Affiliation(s)
- Jun Ouchida
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan
| | - Hiroaki Nakashima
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan.
| | - Tetsuya Ohara
- Department of Orthopedics and Spine Surgery, Meijo Hospital, Nagoya, Japan
| | - Masaaki Machino
- Department of Orthopedics and Spine Surgery, Meijo Hospital, Nagoya, Japan
| | - Sadayuki Ito
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan
| | - Naoki Segi
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan
| | - Ippei Yamauchi
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan
| | - Shiro Imagama
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya-shi, Aichi, 466-8550, Japan
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Zhou S, Zhao Y, Sun Z, Han G, Xu F, Qiu W, Liu T, Li W. Impact of pelvic anteversion on spinopelvic alignment in an asymptomatic population: a dynamic perspective of standing and sitting. Spine J 2024; 24:1732-1739. [PMID: 38614156 DOI: 10.1016/j.spinee.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 04/07/2024] [Accepted: 04/07/2024] [Indexed: 04/15/2024]
Abstract
BACKGROUND CONTEXT A subgroup of patients with pelvic anteversion can present with an unusually large degree of lumbar lordosis (LL), a highly sloped sacrum, and a relatively small pelvic incidence (PI). Prior to lumbar surgery, it can be important to consider such unique sagittal alignment. However, until now, there has been a lack of a predictive model considering different pelvic alignments. Furthermore, the dynamic characteristics of an anteverted pelvis (AP) subgroup have also been unclear. PURPOSE To build linear predictive formulas for LL that take pelvic anteversion into consideration and to explore the dynamic characteristics of an AP subgroup. STUDY DESIGN Monocentric, cross-sectional study. PATIENT SAMPLE Five hundred sixty-five asymptomatic Chinese men and women between the ages of 18 and 80 years. OUTCOME MEASURES Sagittal parameters including LL, lumbar lordosis minus thoracic kyphosis (LL-TK), PI, pelvic tilt (PT), pelvic incidence minus lumbar lordosis (PI-LL), sacral slope (SS), sacral slope divided by pelvic incidence (SS/PI), sagittal vertical axis (SVA), thoracic kyphosis (TK), and T1 (first thoracic vertebra) pelvic angle (TPA) were measured on whole spine radiographs obtained with participants in standing and sitting positions. METHODS All participants underwent radiography in the standing position; 235 of them underwent additional radiography in the sitting position to allow measurement of sagittal parameters. The participants with pelvic anteversion were placed in an AP (anteverted pelvis) group. Sagittal parameters were compared between the AP group and the non-AP group, and predictive formulas for LL based on PI were created in both groups. In addition, changes in sagittal parameters from standing to sitting were compared in the AP group and a PI-matched control group. RESULTS Of the 565 participants, 171 (30.3%) had pelvic anteversion. In comparison with the non-AP group, the AP group presented with larger LL, a larger SS, and a smaller PT, with relatively small PI. The predictive formulas for LL were LL=0.60° × PI+21.60° (R2=0.268; p<.001) in the whole cohort, LL=0. 83×PI+18.75° (R2=0.427; p<.001) in AP group, and LL=0.79°×PI+9.66° (R2=0.451; p<.001) in the non-AP group. In moving from standing to sitting, the AP group presented with a larger decrease in SS and LL compared with the control group, indicating different patterns of spinopelvic motion. CONCLUSIONS In the cohort examined, 30.3% present with pelvic anteversion. Those with AP present with unique characteristics of spinopelvic alignment. In moving from standing to sitting, they exhibit different patterns of spinopelvic motion. We found that identifying the degree of anteversion in each person improves the accuracy of linear models for predicting the degree of LL, which in turn can make plans for spine surgery more accurate.
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Affiliation(s)
- Siyu Zhou
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Yi Zhao
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Peking University Health Science Center, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Zhuoran Sun
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Gengyu Han
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Fei Xu
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Weipeng Qiu
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Peking University Health Science Center, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China
| | - Tongyu Liu
- Peking University Health Science Center, No. 38 Xueyuan Road, Haidian District, Beijing, 100191, China
| | - Weishi Li
- Orthopaedic Department, Peking University Third Hospital, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Beijing Key Laboratory of Spinal Disease Research, No. 49 North Garden Road, Haidian District, Beijing 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, No. 49 North Garden Road, Haidian District, Beijing 100191, China.
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Chiu YC, Tsai PC, Lee SH, Wu WT, Yu TC, Lee RP, Chen IH, Wang JH, Yeh KT. Research of Global Tilt and Functional Independence: Insights into Spinal Health of Older Women. Bioengineering (Basel) 2024; 11:493. [PMID: 38790360 PMCID: PMC11118819 DOI: 10.3390/bioengineering11050493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/24/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024] Open
Abstract
Spinal alignment intricately influences functional independence, particularly in older women with osteopenia experiencing mild neck and back pain. This study elucidates the interplay between spinal alignment, bone mineral density (BMD), and muscle strength in elderly women presenting with mild neck and back pain. Focusing on a cohort of 189 older women, we examined the associations among global tilt (GT), coronal and sagittal alignment, BMD, grip strength, and functional independence as gauged by the Barthel index. Our findings indicate significant associations between functional capacity and grip strength, bone density, GT, and pelvic tilt (PT). Elderly women with a Barthel Index above 80 demonstrated higher grip strength and better bone quality, reflected by less negative average T scores. These individuals also exhibited lower values of GT and PT, suggesting a better sagittal alignment compared to those with a Barthel index of 80 or below. The results highlight that deviations in GT and PT are significantly associated with decreased functional independence. These insights emphasize the importance of maintaining optimal spinal alignment and muscle strength to support functional independence in elderly women. This study underscores the potential for targeted interventions that improve postural stability and manage pain effectively in this vulnerable population.
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Affiliation(s)
- Yu-Chieh Chiu
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
| | - Ping-Chiao Tsai
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
| | - Ssu-Hsien Lee
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
| | - Wen-Tien Wu
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Institute of Medical Sciences, Tzu Chi University, Hualien 970, Taiwan;
| | - Tzai-Chiu Yu
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Ru-Ping Lee
- Institute of Medical Sciences, Tzu Chi University, Hualien 970, Taiwan;
| | - Ing-Ho Chen
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
| | - Jen-Hung Wang
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan;
| | - Kuang-Ting Yeh
- School of Medicine, Tzu Chi University, Hualien 970, Taiwan; (Y.-C.C.); (P.-C.T.); (S.-H.L.); (W.-T.W.); (T.-C.Y.); (I.-H.C.)
- Department of Orthopedics, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Institute of Medical Sciences, Tzu Chi University, Hualien 970, Taiwan;
- Department of Medical Education, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Graduate Institute of Clinical Pharmacy, Tzu Chi University, Hualien 970, Taiwan
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Gao Y, Jiang H, Gao R, Zhou X. Evaluation of lumbar paraspinal muscles degeneration and fatty infiltration in dynamic sagittal imbalance based on magnetic resonance imaging. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2024; 33:1840-1849. [PMID: 38043127 DOI: 10.1007/s00586-023-08033-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 08/08/2023] [Accepted: 10/26/2023] [Indexed: 12/05/2023]
Abstract
PURPOSE To explore degeneration and fatty infiltration (FI) of lumbar paraspinal muscles in patients with dynamic sagittal imbalance (DSI) and the relationship between lumbar paraspinal muscles degeneration, fatty infiltration and severity of the disease. METHODS We recruited 41 DSI patients and selected 22 lumbar spinal stenosis (LSS) patients without osphyalgia as controls. All patients received magnetic resonance imaging (MRI) scan and DSI patients also received pre-walk and post-walk X-rays. DSI patients were divided into 2 subgroups according to their symptom improvement after conservative treatment. We calculated rmCSA and FI of the lumbar paraspinal muscles. The rmCSA and FI between DSI and control and between DSI subgroups were compared by t test. The regression analysis was used to explore the risk factors influencing disease severity. Receiver operating characteristic (ROC) curves and area under curves (AUCs) were used to evaluate the severity of the disease. RESULTS In comparison of rmCSA and FI between DSI and control, there are significant differences of most muscles. In comparison of rmCSA between two subgroups, there are significant differences of most muscles, while in comparison of FI, only muscles in L4 segment have significant different. In logistic regression analysis, total rmCSA and total FI are risk factors influencing disease severity. ROC curves shows that total rmCSA and total FI both achieve an AUC greater than 0.7. CONCLUSION Compared with control, DSI patients have degeneration and fatty infiltration of the lumbar paraspinal muscles. The degeneration and fatty infiltration are risk factors influencing disease severity. The total rmCSA and total FI can be used as an indicator to determine whether a patient has severe DSI.
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Affiliation(s)
- Yuan Gao
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China
| | - Heng Jiang
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China
| | - Rui Gao
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
| | - Xuhui Zhou
- Department of Orthopedics, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, No. 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
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Mizukoshi R, Yagi M, Yamada Y, Yokoyama Y, Yamada M, Watanabe K, Nakamura M, Nagura T, Jinzaki M. Gender differences in spinal mobility during postural changes: a detailed analysis using upright CT. Sci Rep 2024; 14:9154. [PMID: 38644423 PMCID: PMC11033253 DOI: 10.1038/s41598-024-59840-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 04/16/2024] [Indexed: 04/23/2024] Open
Abstract
Lumbar spinal alignment is crucial for spine biomechanics and is linked to various spinal pathologies. However, limited research has explored gender-specific differences using CT scans. The objective was to evaluate and compare lumbar spinal alignment between standing and sitting CT in healthy individuals, focusing on gender differences. 24 young and 25 elderly males (M) and females (F) underwent standing and sitting CT scans to assess lumbar spinal alignment. Parameters measured and compared between genders included lumbar lordosis (LL), sacral slope (SS), pelvic tilt (PT), pelvic incidence (PI), lordotic angle (LA), foraminal height (FH), and bony boundary area (BBA). Females showed significantly larger changes in SS and PT when transitioning from standing to sitting (p = .044, p = .038). A notable gender difference was also observed in the L4-S LA among the elderly, with females showing a significantly larger decrease in lordotic angle compared to males (- 14.1° vs. - 9.2°, p = .039*). Females consistently exhibited larger FH and BBA values, particularly in lower lumbar segments, which was more prominent in the elderly group (M vs. F: L4/5 BBA 80.1 mm2 [46.3, 97.8] vs. 109.7 mm2 [74.4, 121.3], p = .019 in sitting). These findings underline distinct gender-related variations in lumbar alignment and flexibility, with a focus on noteworthy changes in BBA and FH in females. Gender differences in lumbar spinal alignment were evident, with females displaying greater pelvic and sacral mobility. Considering gender-specific characteristics is crucial for assessing spinal alignment and understanding spinal pathologies. These findings contribute to our understanding of lumbar spinal alignment and have implications for gender-specific spinal conditions and treatments.
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Affiliation(s)
- Ryo Mizukoshi
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare, Chiba, Japan
| | - Mitsuru Yagi
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan.
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare, Chiba, Japan.
| | - Yoshitake Yamada
- Department of Radiology, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Yoichi Yokoyama
- Department of Radiology, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Minoru Yamada
- Department of Radiology, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Kota Watanabe
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Masaya Nakamura
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Takeo Nagura
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan
| | - Masahiro Jinzaki
- Department of Radiology, Keio University School of Medicine, 35 Shinanomachi Shinjyuku, Tokyo, Japan.
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Dharnipragada R, Bostrom N, Bertogliat M, Denduluri LS, Dhawan S, Ladd B, Woodrow S, Parr AM. Sagittal balance in sitting and standing positions: A systematic review of radiographic measures. Heliyon 2024; 10:e28545. [PMID: 38590852 PMCID: PMC10999916 DOI: 10.1016/j.heliyon.2024.e28545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 03/16/2024] [Accepted: 03/20/2024] [Indexed: 04/10/2024] Open
Abstract
Background Sagittal imbalance can be caused by various etiologies and is among the most important indicators of spinal deformity. Sagittal balance can be restored through surgical intervention based on several radiographic measures. The purpose of this study is to review the normal parameters in the sitting position, which are not well understood and could have significant implications for non-ambulatory patients. Methods A systematic review was performed adhering to PRISMA Guidelines. Using R-software, the weighted means and 95% confidence intervals of the radiographic findings were calculated using a random effect model and significance testing using unpaired t-tests. Results 10 articles with a total of 1066 subjects reported radiographic measures of subjects with no spinal deformity in the sitting and standing position. In the healthy individual, standing sagittal vertical axis -16.8°was significantly less than sitting 28.4° (p < 0.0001), while standing lumbar lordosis 43.3°is significantly greater than sitting 21.3° (p < 0.0001). Thoracic kyphosis was not significantly different between the two groups (p = 0.368). Standing sacral slope 34.3° was significantly greater than sitting 19.5° (p < 0.0001) and standing pelvic tilt 14.0° was significantly less than sitting 33.9° (p < 0.0001). Conclusions There are key differences between standing and sitting postures, which could lead to undue stress on surgical implants and poor outcomes, especially for non-ambulatory populations. There is a need for more studies reporting sitting and standing radiographic measures in different postures and spinal conditions.
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Affiliation(s)
- Rajiv Dharnipragada
- University of Minnesota Medical School, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Nick Bostrom
- University of Minnesota Medical School, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Mario Bertogliat
- University of Minnesota Medical School, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Lalitha S. Denduluri
- College of Liberal Arts, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Sanjay Dhawan
- Department of Neurosurgery, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Bryan Ladd
- Department of Neurosurgery, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
| | - Sarah Woodrow
- Department of Neurological Surgery, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Ann M. Parr
- Department of Neurosurgery, University of Minnesota Twin-Cities, Minneapolis, MN 55455, USA
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Sun Q, Wang L, Chen X, Zhang Y, Tian Y, Yuan S, Liu X. How Sagittal Spinal Parameters Predict Anterolateral Spinal Ossification Severity: A Study Based on CT Classification. Spine (Phila Pa 1976) 2023; 48:1679-1687. [PMID: 36728011 DOI: 10.1097/brs.0000000000004582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 11/01/2022] [Indexed: 02/03/2023]
Abstract
STUDY DESIGN Retrospective observational study. OBJECTIVE The purpose of this study was to establish a CT classification system of anterolateral spinal ossification and analyze the effects of sagittal spinal parameters on ossification. SUMMARY OF BACKGROUND DATA Patients with diffuse idiopathic skeletal hyperostosis often present with anterolateral ossification of the spine. Few reports consider anterolateral spinal ossification at each spinal level or explore the influence of sagittal alignment. MATERIALS AND METHOD One hundred and twenty patients (79 males and 41 females) over 60 years old who underwent whole spinal CT scans from October 2018 to November 2021 were analyzed. Volume rendering technique images were used to assess the degree of anterolateral spinal ossification in each intervertebral space, and a classification system was established. Sagittal parameters, such as thoracic kyphosis, lumbar lordosis (LL), cervical lordosis, sacral slope, and thoracolumbar junction angle of the patients were measured. Multifactor stepwise linear regression analysis and ordered logistic regression analysis were used to study the effects of the sagittal parameters on ossification grades. RESULTS The median age of the study population was 67 years (63-72 IQR). The new classification system classifies the severity of anterolateral spinal ossification in each intervertebral space into grades 0 to 3 with an intra-observer intraclass correlation coefficient value of 0.909 and inter-observer intraclass correlation coefficient value of 0.900. Multivariate stepwise linear regression analysis showed that age (OR=1.30, P <0.001), weight (OR=1.23, P =0.013), and cervical lordosis (OR=1.19, P <0.001) were significantly correlated with total ossification grade. Multifactor ordered logistic regression analysis showed that there was a statistically significant correlation between cervical lordosis and the ossification grades of each intervertebral space of T1~T4 ( P ≤0.005), between thoracic kyphosis and each intervertebral space in T4~T12 ( P ≤0.019), and between thoracolumbar junction angle and each intervertebral space in T10~L3 ( P ≤0.025). LL was significantly and positively correlated with the ossification grades of each intervertebral space in T7~T11 ( P ≤0.041). LL and sacral slope were significantly negatively correlated with the ossification grades of each intervertebral space in L3~S1 ( P ≤0.047). CONCLUSION Our new classification scheme demonstrated good accuracy and reliability for the evaluation of the severity of anterolateral spinal ossification. The effect of sagittal parameters on anterolateral spinal ossification was position-specific. The greater the kyphosis or the smaller the lordosis of a spinal region, the more severe the degree of ossification in the corresponding region. LEVEL OF EVIDENCE 3.
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Affiliation(s)
- Qingyu Sun
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, Shandong, P. R. China
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Xilong C, Kangkang W, Wanmei Y, Beibei L, Yunlei Z, Haiyang Y, Zikai H. Sagittal Spinopelvic Alignment in the Standing and Prone Positions of Patients with Old Traumatic Thoracolumbar Kyphosis: Relationship with Immediately Postoperative Parameters. World Neurosurg 2023; 176:e692-e696. [PMID: 37295468 DOI: 10.1016/j.wneu.2023.05.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the changes in spine-pelvis sagittal parameters from the standing position to the prone position and to study the relationship between sagittal parameters and immediately postoperative parameters. METHODS Thirty-six patients with old traumatic spinal fracture combined with kyphosis were enrolled. The preoperative standing position, prone position, and postoperative sagittal parameters of the spine and pelvis, including the local kyphosis Cobb angle (LKCA), thoracic kyphosis angle (TKA), lumbar lordosis angle (LLA), sacral slope (SS), pelvic tilt (PT), pelvic incidence minus lumbar lordosis angle (PI-LLA), and sagittal vertebral axis (SVA), were measured. The data of kyphotic flexibility and correction rate werecollected and analyzed. The parameters of the preoperative standing position, prone position and postoperative sagittal position were analyzed statistically. Correlation analysis and regression analysis of the preoperative standing and prone sagittal parameters and postoperative parameters were conducted. RESULTS There were significant differences in the preoperative standing position, prone position, and postoperative LKCA and TK. Correlation analysis showed that preoperative sagittal parameters of the standing position and prone position were all correlated with postoperative homogeneity. Flexibility was not related to the correction rate. Regression analysis showed preoperative standing, prone LKCA, and TK were linear with postoperative standing. CONCLUSIONS The LKCA and TK of old traumatic kyphosis obviously changed from the standing position to the prone position, which were linear with postoperative LKCA and TK and can be used to predict postoperative sagittal parameters. This change should be taken into account in the surgical strategy.
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Affiliation(s)
- Cui Xilong
- School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China
| | - Wang Kangkang
- Department of Orthopedics, Fuyang People's Hospital, Fuyang City, Anhui, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China
| | - Yang Wanmei
- Department of Orthopedics, Fuyang People's Hospital, Fuyang City, Anhui, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China
| | - Li Beibei
- Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China; Department of Orthopedics, The Sixth Fuyang People's Hospital, Fuyang City, Anhui, China
| | - Zhai Yunlei
- Department of Orthopedics, Fuyang People's Hospital, Fuyang City, Anhui, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China
| | - Yu Haiyang
- Department of Orthopedics, Fuyang People's Hospital, Fuyang City, Anhui, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China
| | - Hua Zikai
- School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, China; Spinal Deformity Clinical and Research Center of Anhui Province, Fuyang City, Anhui, China.
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Lukas KJ, Verhaegen JCF, Livock H, Kowalski E, Phan P, Grammatopoulos G. The effect of ethnicity on the age-related changes of spinopelvic characteristics: a systematic review. Bone Joint Res 2023; 12:231-244. [PMID: 37051815 PMCID: PMC10065848 DOI: 10.1302/2046-3758.124.bjr-2022-0335.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Spinopelvic characteristics influence the hip's biomechanical behaviour. However, to date there is little knowledge defining what 'normal' spinopelvic characteristics are. This study aims to determine how static spinopelvic characteristics change with age and ethnicity among asymptomatic, healthy individuals. This systematic review followed the Preferred Reporting Items for Systematic Review and Meta-Analyses guidelines to identify English studies, including ≥ 18-year-old participants, without evidence of hip or spine pathology or a history of previous surgery or interventional treatment, documenting lumbar lordosis (LL), sacral slope (SS), pelvic tilt (PT), and pelvic incidence (PI). From a total of 2,543 articles retrieved after the initial database search, 61 articles were eventually selected for data extraction. When all ethnicities were combined the mean values for LL, SS, PT, and PI were: 47.4° (SD 11.0°), 35.8° (SD 7.8°), 14.0° (SD 7.2°), and 48.8° (SD 10°), respectively. LL, SS, and PT had statistically significant (p < 0.001) changes per decade at: -1.5° (SD 0.3°), -1.3° (SD 0.3°), and 1.4° (SD 0.1°). Asian populations had the largest age-dependent change in LL, SS, and PT compared to any other ethnicity per decade at: -1.3° (SD 0.3°) to -0.5° (SD 1.3°), -1.2° (SD 0.2°) to -0.3° (SD 0.3°), and 1.7° (SD 0.2°) versus 1.1° (SD 0.1°), respectively. Ageing alters the orientation between the spine and pelvis, causing LL, SS, and PT to modify their orientations in a compensatory mechanism to maintain sagittal alignment for balance when standing. Asian populations have the largest degree of age-dependent change to their spinopelvic parameters compared to any other ethnicity, likely due to their lower PI.
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Affiliation(s)
- Kenneth J. Lukas
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Canada
| | - Jeroen C. F. Verhaegen
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Canada
- University Hospital Antwerp, Edegem, Belgium
- Orthopedic Center Antwerp, Antwerp, Belgium
| | - Holly Livock
- Division of Orthopaedic Surgery, Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | | | - Philippe Phan
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Canada
| | - George Grammatopoulos
- Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, Canada
- University of Ottawa, Ottawa, Canada
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Zhou S, Zhong W, Sun Z, Guo Y, Zhao Y, Li W, Li W. The Standing and Sitting Spino-Pelvic Sagittal Alignment in Patients with Instrumented Lumbar Fusion Might Correlate with Adjacent Segment Degeneration. Orthop Surg 2022; 14:3313-3321. [PMID: 36303439 PMCID: PMC9732614 DOI: 10.1111/os.13553] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/08/2022] [Accepted: 09/15/2022] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES Sitting is a common weight-bearing posture, like standing, but there still lacks enough understanding of sagittal alignment in sitting position for patients after lumbar fusion. This study aimed to investigate the accommodation of fixed spine from standing to sitting position and its influence on unfused segments. METHODS Sixty-two patients after lumbar fusion (test group) and 40 healthy volunteers (control group) were recruited in this research. All subjects underwent lateral radiographs of entire spine in the standing and sitting positions. The spinopelvic parameters including sagittal vertical axis (SVA), T1 pelvic angle (TPA), lumbar lordosis (LL), thoracic kyphosis (TK), and pelvic tilt (PT) were measured. The changes in parameters of patients between two positions were compared with control group, and patients were divided in different groups based on fusion level and their parameters were compared. RESULTS When changing from standing to sitting positions, a forward-moving SVA and TPA were observed in both patients and control groups, accompanied by the decrease in LL, TK and increase in PT, but the changes of patients were smaller in TPA, LL, and TK (6.5° ± 7.2° vs 9.7° ± 6.0°, 7.7° ± 8.3° vs 13.6° ± 8.5°, 2.2° ± 6.5° vs 5.4° ± 5.1°, respectively, p < 0.05). Increase of PT in the lumbosacral fixation group was lower than that in the control group (4.4° ± 9.1° vs 8.3° ± 7.1°, p < 0.05). Patients who had adjacent segments degeneration (ASD) showed more kyphosis in unfused lumbar segments than the other patients (16.4° ± 10.7° vs -1.0° ± 4.8°, p < 0.05) from standing to sitting. CONCLUSIONS The spine straightens in lumbar and thoracic curve, combined with forward-moving axis and pelvic retroversion when changing to the sitting position. However, these changes are relatively limited in patients after lumbar fusion, so the adjacent unfused lumbar segments compensate to stress during sitting and this may be related to ASD.
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Affiliation(s)
- Siyu Zhou
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
| | - Woquan Zhong
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
| | - Zhuoran Sun
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
| | - Yang Guo
- Department of OrthopaedicTianjin HospitalTianjinChina
| | - Yi Zhao
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
| | - Wei Li
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
| | - Weishi Li
- Orthopaedic DepartmentPeking University Third HospitalBeijingChina,Beijing Key Laboratory of Spinal Disease ResearchBeijingChina,Engineering Research Center of Bone and Joint Precision MedicineMinistry of EducationBeijingChina
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12
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Sun Z, Zhou S, Jiang S, Zou D, Yu M, Li W. Variations of Sagittal Alignment in Standing Versus Sitting Positions Under the Roussouly Classification in Asymptomatic Subjects. Global Spine J 2022; 12:772-779. [PMID: 33030075 PMCID: PMC9344504 DOI: 10.1177/2192568220962436] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
STUDY DESIGN Prospective radiological analysis. OBJECTIVE To investigate the characteristics of the sagittal spinopelvic alignment in the standing and sitting positions under the Roussouly classification in a healthy population. METHODS This study using standing and sitting lateral radiographs included 143 volunteers whose spinopelvic parameters were measured. The parameters were compared in the standing and sitting positions. The lumbo-pelvic profile was identified according to the Roussouly classification. The differences in the values of the parameters between the standing and sitting positions were analyzed. The different frequencies of the unchanged apex were assessed. RESULTS All parameter values except the thoracolumbar angle (TLK) were significantly altered. With regard to the classification of the lumbopelvic profile, 15 (10.5%) subjects were excluded because they were evaluated as not belonging to any of the Roussouly types. The remaining 128 subjects were evaluated and classified as follows: 19 (14.8%), type 1; 53 (41.4%), type 2; 9 (7.0%), type 3 + anteverted pelvis (AP); 33 (25.8%), type 3; and 14 (10.9%), type 4. The differences in the pelvic tilt (PT), sacral slope (SS), and thoracic pelvic angle (TPA) values were significantly lower in types 1 and 2 than in other Roussouly types. Corresponding variations in the apical vertebra for the sagittal lumbar curves in the sitting position were observed. CONCLUSIONS Subjects with Roussouly type 1 and type 2 sagittal alignments were found to be less capable of performing changes in alignment when changing to the sitting position. The characteristics of the apical movement were also different.
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Affiliation(s)
- Zhuoran Sun
- Peking University Third Hospital,
Beijing, China
| | - Siyu Zhou
- Peking University Third Hospital,
Beijing, China
| | - Shuai Jiang
- Peking University Third Hospital,
Beijing, China
| | - Da Zou
- Peking University Third Hospital,
Beijing, China
| | - Miao Yu
- Peking University Third Hospital,
Beijing, China
| | - Weishi Li
- Peking University Third Hospital,
Beijing, China,Weishi Li, Orthopaedic Department, Peking
University Third Hospital, No. 49, North Garden Street, HaiDian District,
Beijing, 100191, China.
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13
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Zhai M, Huang Y, Zhou S, Feng J, Pei C, Wen L. Effects of a postural cueing for head and neck posture on lumbar lordosis angles in healthy young and older adults: a preliminary study. J Orthop Surg Res 2022; 17:199. [PMID: 35379258 PMCID: PMC8981642 DOI: 10.1186/s13018-022-03090-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
Background Postural rehabilitation plays an important role in the treatment of non-specific low back pain. Although pelvic inclination has been widely used to improve lumbar lordosis, the effect of cervical anterior inclination on lumbar lordosis in young and older adults in sitting and standing posture is still unclear. This preliminary study was designed to examine the influence of changing the cervical anterior angle on the lumbar lordosis angle, through alterations of the head position under the natural sitting and standing conditions, aiming to provide a basis for establishing a new postural rehabilitation strategy. Methods Thirty-six young (24.0 ± 2.2 years, 14 females and 22 males) and 38 older (68.4 ± 5.9 years, 36 females and 2 males) healthy adults participated in this study. The four spinal regional angles—cervical anterior angle, thoracic kyphosis angle, lumbar lordosis angle, and pelvic forward inclination angle, were measured in standing and relaxed sitting postures to determine the effects of a postural cueing for the head and neck posture, “inclining head backward and performing chin tuck,” on lumbar lordosis angle. Results In the standing posture, the pelvic forward inclination angle in the older adult group was significantly smaller (P < 0.001, by ANOVA) than that in the young adult group and increased significantly (P < 0.001) in response to the postural cueing. In addition, the thoracic kyphosis angle in the standing (P = 0.001) and sitting (P = 0.003) positions was significantly reduced in response to the postural cueing. However, the lumbar lordosis angle in response to the postural cueing increased significantly in both the standing position (P < 0.001) and sitting position (P < 0.001). Conclusion The results suggest that increasing the cervical anterior angle can increase the lumbar lordosis angle, and the cervical anterior inclination can be used as an alternative to pelvic forward inclination to improve the lumbar lordosis angle. Furthermore, the change in head and neck posture can reduce the thoracic kyphosis angle, making it possible to establish a new noninvasive body posture rehabilitation strategy. Supplementary Information The online version contains supplementary material available at 10.1186/s13018-022-03090-9.
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Affiliation(s)
- Meiling Zhai
- School of Sports and Health, Nanjing Sport Institute, No.8 Linggusi road, Nanjing, 210014, Jiangsu, China.,Institute of Exercise and Health, Tianjin University of Sport, No.16 Donghai Road, West Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Yongchao Huang
- School of Sports and Health, Nanjing Sport Institute, No.8 Linggusi road, Nanjing, 210014, Jiangsu, China.,Institute of Exercise and Health, Tianjin University of Sport, No.16 Donghai Road, West Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Shi Zhou
- Sport and Exercise Science, Faculty of Health, Southern Cross University, P Block, Military Road, East Lismore, NSW, 2480, Australia
| | - Jiayun Feng
- Institute of Sports Training, Tianjin University of Sport, No.16 Donghai Road, West Tuanbo New Town, Jinghai District, Tianjin, 301617, China
| | - Chaolei Pei
- Institute of Sports Training, Shanxi Normal University, No.339 Taiyu Road, Xiaodian District, Taiyuan City, 030000, China
| | - Li Wen
- School of Sports and Health, Nanjing Sport Institute, No.8 Linggusi road, Nanjing, 210014, Jiangsu, China.
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Saad E, Semaan K, Kawkabani G, Massaad A, Salibv RM, Mekhael M, Fakhoury M, Karam KA, Jaber E, Ghanem I, Lafage V, Skalli W, Rachkidi R, Assi A. Alteration of the Sitting and Standing Movement in Adult Spinal Deformity. Front Bioeng Biotechnol 2022; 9:751193. [PMID: 35096787 PMCID: PMC8792509 DOI: 10.3389/fbioe.2021.751193] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 12/03/2021] [Indexed: 12/03/2022] Open
Abstract
Adults with spinal deformity (ASD) are known to have spinal malalignment affecting their quality of life and daily life activities. While walking kinematics were shown to be altered in ASD, other functional activities are yet to be evaluated such as sitting and standing, which are essential for patients’ autonomy and quality of life perception. In this cross-sectional study, 93 ASD subjects (50 ± 20 years; 71 F) age and sex matched to 31 controls (45 ± 15 years; 18 F) underwent biplanar radiographic imaging with subsequent calculation of standing radiographic spinopelvic parameters. All subjects filled HRQOL questionnaires such as SF36 and ODI. ASD were further divided into 34 ASD-sag (with PT > 25° and/or SVA >5 cm and/or PI-LL >10°), 32 ASD-hyperTK (with only TK >60°), and 27 ASD-front (with only frontal malalignment: Cobb >20°). All subjects underwent 3D motion analysis during the sit-to-stand and stand-to-sit movements. The range of motion (ROM) and mean values of pelvis, lower limbs, thorax, head, and spinal segments were calculated on the kinematic waveforms. Kinematics were compared between groups and correlations to radiographic and HRQOL scores were computed. During sit-to-stand and stand-to-sit movements, ASD-sag had decreased pelvic anteversion (12.2 vs 15.2°), hip flexion (53.0 vs 62.2°), sagittal mobility in knees (87.1 vs 93.9°), and lumbar mobility (L1L3-L3L5: −9.1 vs −6.8°, all p < 0.05) compared with controls. ASD-hyperTK showed increased dynamic lordosis (L1L3–L3L5: −9.1 vs −6.8°), segmental thoracic kyphosis (T2T10–T10L1: 32.0 vs 17.2°, C7T2–T2T10: 30.4 vs 17.7°), and thoracolumbar extension (T10L1–L1L3: −12.4 vs −5.5°, all p < 0.05) compared with controls. They also had increased mobility at the thoracolumbar and upper-thoracic spine. Both ASD-sag and ASD-hyperTK maintained a flexed trunk, an extended head along with an increased trunk and head sagittal ROM. Kinematic alterations were correlated to radiographic parameters and HRQOL scores. Even after controlling for demographic factors, dynamic trunk flexion was determined by TK and PI-LL mismatch (adj. R2 = 0.44). Lumbar sagittal ROM was determined by PI-LL mismatch (adj. R2 = 0.13). In conclusion, the type of spinal deformity in ASD seems to determine the strategy used for sitting and standing. Future studies should evaluate whether surgical correction of the deformity could restore sitting and standing kinematics and ultimately improve quality of life.
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Affiliation(s)
- Eddy Saad
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - Karl Semaan
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | | | - Abir Massaad
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | | | - Mario Mekhael
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - Marc Fakhoury
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | | | - Elena Jaber
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - Ismat Ghanem
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - Virginie Lafage
- Orthopaedics Surgery, Lenox Hill Hospital, New York, NY, United States
| | - Wafa Skalli
- Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers, Paris, France
| | - Rami Rachkidi
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - Ayman Assi
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
- Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers, Paris, France
- *Correspondence: Ayman Assi,
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PINHEIRO RÔMULOPEDROZA, DEFINO MATHEUSPIPPA, GARCIA FLÁVIOLUIS. EFFECTS OF HIP FLEXION CONTRACTURE ON SAGITTAL SPINOPELVIC PARAMETERS. ACTA ORTOPÉDICA BRASILEIRA 2022; 30:e249453. [PMID: 36092183 PMCID: PMC9425921 DOI: 10.1590/1413-785220223004e249453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 05/11/2021] [Indexed: 12/02/2022]
Abstract
Objective: To assess the influence of hip flexion contracture on lumbar lordosis and spinopelvic parameters and the changes in these parameters after total hip arthroplasty (THA). Methods: Twenty adult patients with hip osteoarthritis were divided into two groups (ten patients with hip flexion contracture and ten without contracture). Patients were assessed preoperatively and six months after THA using the radiographic parameters sagittal vertical axis (SVA), lumbar lordosis (LL), pelvic incidence (PI), sacral slope (SS), and pelvic tilt (PT). Results: No statistical difference was found between pre- and postoperative LL values in the groups. After THA, both groups had increased PT and the group without hip flexion contracture had reduced SS. Conclusion: Patients with hip osteoarthritis and hip flexion contracture tend to have an increased LL in the orthostatic position compared to patients without contracture, but with no statistical significance. After THA, PT increased in both groups and SS decreased in patients without hip contracture. Studies should further investigate the role of hip flexion contracture on pelvic mobility and spinopelvic parameters to better understand these relations. Level of Evidence III, Case-Control Study.
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Azimi P, Yazdanian T, Benzel EC, Montazeri A. Global Sagittal Balance of Spine in Asymptomatic Controls: A Systematic Review and Meta-Analysis. World Neurosurg 2021; 154:93-108. [PMID: 34314909 DOI: 10.1016/j.wneu.2021.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 07/04/2021] [Accepted: 07/08/2021] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To assess the global sagittal balance of spine (GSBS) in asymptomatic controls. METHODS PubMed, Scopus, Cochrane library, and Web of Science searched up to July 2020. Studies were screened for the GSB parameters including T1 pelvic angle (TPA), spinosacral angle (SSA), sagittal vertical axis (SVA), C7/sacrofemoral distance ratio (Barrey index), odontoid hip axis (OD-HA), and Full Balance Index (FBI) as measured in asymptomatic participants. A meta-analysis was performed to synthesize pooled estimates. Heterogeneity and publication bias were assessed. RESULTS Overall, 76 studies were identified including 12,169 participants (54.7% female) with mean age ranges from 12.0 to 72.9 years old. We used the Newcastle-Ottawa Scale (NOS) to evaluate the quality of studies included in this review. Begg's test did not indicate obvious publication bias. The pooled analysis reveals that the mean (standard deviation) normative values were: 1) age ˃18 years, SSA (°), 127.6 (0.89); SVA absolute value (millimeters), 13.1 (1.13); TPA (°), 9.8 (1.13); T1SPI (°), -4.3 (0.57); and Barrey index absolute value, 0.51 (0.3). The mean value of the OD-HA (°) was reported 2.9 (1.6), and the FBI average value was less than 5°. 2) Age ≤18 years, SSA (°), 132.1 (8.3); SVA absolute value (millimeters), 11.9 (2.0); and Barrey index, -0.7 (8.3). A significant difference was observed between the 2 age groups based on SVA and SSA. CONCLUSIONS This paper presents normative data on TPA, SSA, SVA, Barrey index, OD-HA, and FBI as a reference for evaluating/measuring a GSB of spine in asymptomatic controls.
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Affiliation(s)
- Parisa Azimi
- Department of Neurosurgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | | | - Edward C Benzel
- Cleveland Clinic Foundation, Department of Neurosurgery, Cleveland, Ohio, USA
| | - Ali Montazeri
- Mental Health Research Group, Health Metrics Research Centre, Iranian Institute for Health Sciences Research, ACECR, Tehran, Iran
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Zhang Z, Qi D, Wang T, Wang Z, Wang Y. Spine-Pelvis-Hip Alignments in Degenerative Spinal Deformity Patients and Associated Procedure of One-Stage Long-Fusion with Multiple-Level PLIF or Apical-Vertebra Three Column Osteotomy-a Clinical and Radiographic Analysis Study. Orthop Surg 2021; 13:2008-2017. [PMID: 34541786 PMCID: PMC8528996 DOI: 10.1111/os.13059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE To explore the spine-pelvis-hip alignments in degenerative spinal deformity (DSD) patients, and compare the outcomes in the procedure of long-fusion with posterior lumbar inter-body fusion (PLIF) or single-level three-column osteotomy (STO) at lower lumbar level (LLL, L3 -S1 ) and thoracolumbar levels (TLL, T10 -L2 ) for those patients. METHODS This is a retrospective study. Following institutional ethics approval, a total of 83 patients (Female, 67; Male, 16) with DSD underwent long-fusion with PLIF or STO surgery between March 2015 and December 2017 were reviewed. All of those patients were assigned into LLL and TLL groups. The average age at surgery was 65.2 years (SD, 8.1). Demographic (age, gender, BMI, and comorbidities), radiographs (both coronal and sagittal parameters) and health-related quality of life (HRQOL) assessments were documented. The radiographic parameters and HRQOL-related measurements at pre- and post-operation were compared with paired-samples t test, and those variables in the two groups were analyzed using an independent-sample t test. The relationships between pelvic incidence (PI) and other sagittal parameters were investigated with Pearson correlation analysis. The Pearson χ2 or Fisher's exact was carried out for comparison of gender, incidence of comorbidities and post-operative complications. RESULTS There were 53 and 30 patients in the LLL and TLL groups respectively. Those spino-pelvic radiographic parameters had significant improvements after surgeries (P < 0.001). The patients in the two group with different pre-operative thoracolumbar kyphosis (TLK, P = 0.003), PI (P = 0.02), and mismatch of PI minus lumbar lordosis (PI-LL, P = 0.01) had comparable post-operative radiographic parameters except PI (P = 0.04) and pelvic-femur angle (PFA, P = 0.02). Comparing the changes of those spine-pelvic-hip data during surgeries, the corrections of TLK in TLL group were significant larger (P = 0.004). Pearson correlation analysis showed that there were negative relationship between PI and TLK (r = -0.302, P = 0.005), positive relationship between PI and LL (r = 0.261, P = 0.016) at pre-operation. Those patients underwent the surgical procedure that long-segment instrumentation and fusion with STO would have higher incidence of complications involving longer operative timing (P = 0.018), more blood loss (P < 0.001), revision surgery (P = 0.008), and cerebrospinal fluid leakage (P = 0.001). All the HRQOL scores significantly improved at final follow-up (P < 0.001), with no difference of intra-group. CONCLUSION Patients suffered de-novo scoliosis or hyper-kyphosis with low PI would be vulnerable to significant thoracolumbar degeneration, and have more changes of spine-pelvis-hip data after long-fusion surgery, however, those with high PI would be closed to significant lumbar degeneration. Although spine-pelvis-hip alignments in DSD patients can be restored effectively after long-fusion with PLIF or STO, the incidence of complications in patients underwent STO was significant higher than that in patients performed multi-level PLIF.
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Affiliation(s)
- Zi‐fang Zhang
- The Medical College of Nankai UniversityTianjinChina
- The Spine SurgeryThe First Medical Center of the Chinese PLA General HospitalBeijingChina
| | - Deng‐bin Qi
- The Spine SurgeryThe First Medical Center of the Chinese PLA General HospitalBeijingChina
| | - Tian‐hao Wang
- The Spine SurgeryThe First Medical Center of the Chinese PLA General HospitalBeijingChina
| | - Zheng Wang
- The Spine SurgeryThe First Medical Center of the Chinese PLA General HospitalBeijingChina
| | - Yan Wang
- The Medical College of Nankai UniversityTianjinChina
- The Spine SurgeryThe First Medical Center of the Chinese PLA General HospitalBeijingChina
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Xia W, Wang W, Zhu Z, Liu C, Xu S, Meng F, Liu H, Wang K. The compensatory mechanisms for global sagittal balance in degenerative spinal kyphosis patients: a radiological analysis of muscle-skeletal associations. BMC Musculoskelet Disord 2021; 22:733. [PMID: 34452605 PMCID: PMC8401063 DOI: 10.1186/s12891-021-04621-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 08/16/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The position of the head relative to the spine can be used to evaluate the true global balance in patients with degenerative spinal kyphosis (DSK). However, it is still not clear how the position of the head is related to the spinal-pelvic parameters and lumbar muscles, which are most commonly considered. METHODS Sixty-seven patients with DSK admitted in the hospital from January 2017 to January 2019 were retrospectively analyzed. All patients had whole spine X-ray and lumbar MRI. The head position parameters include: the angles of both lines joining the center of acoustic meati (CAM) to the center of the bi-coxofemoral axis (BA) (CAM-BA) and the most superior point of dentiform apophyse of C2 odontoid (OD) to BA (OD-BA) with the vertical line; the distance between the vertical line passing CAM and the posterior upper edge of the S1 (CAM-SVA). The spinal parameters include: C7 sagittal vertical axis (C7-SVA), thoracic kyphosis (TK), thoracolumbar kyphosis (TLK), and lumbar lordosis (LL). The pelvic parameters include: pelvic incidence (PI), pelvic tilt (PT) and sacral slope (SS). The relative cross-sectional area (RCSA) of bilateral multifidus, erector spinae and psoas muscle at L3/4 and L4/5 segments were measured. The correlations between head position parameters and the spinal-pelvic parameters and RCSA of lumbar muscles were analyzed, respectively. RESULTS Significant positive correlations were found between each two of CAM-SVA, C7-SVA, CAM-BA and OD-BA (p < 0.001). SS was found to be significantly positively correlated with CAM-BA (r = 0.377, p = 0.034) and OD-BA (r = 0.402, p = 0.023). CAM-BA was found to be significantly negatively correlated with TK (r = - 0.367, p = 0.039). Significant positive correlations were found between RCSA of multifidus at L3/4 level and CAM-SVA (r = 0.413, p = 0.021), CAM-BA (r = 0.412, p = 0.019) and OD-BA (r = 0.366, p = 0.04). CONCLUSIONS Our study showed that the head position relative to the spine were significantly correlated to some spinal-pelvic parameters, and the lower lumbar multifidus muscle. The compensatory mechanisms of the global sagittal balance status should also involve the head position area.
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Affiliation(s)
- Weiwei Xia
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Weiyan Wang
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Zhenqi Zhu
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Chenjun Liu
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Shuai Xu
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Fanqi Meng
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Haiying Liu
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China
| | - Kaifeng Wang
- Department of Spinal Surgery, Peking University People's Hospital, Xizhimen south street No. 11, Xicheng district, Beijing, 100044, China.
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Wang D, Wang K, Liu Z, Wang Z, Wu H. Valproic Acid Labeled Chitosan Nanoparticles Promote the Proliferation and Differentiation of Neural Stem Cells After Spinal Cord Injury. Neurotox Res 2021; 39:456-466. [PMID: 33247828 DOI: 10.1007/s12640-020-00304-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/05/2020] [Accepted: 10/21/2020] [Indexed: 12/12/2022]
Abstract
Chitosan nanoparticles and valproic acid are demonstrated as the protective agents in the treatment of spinal cord injury (SCI). However, the effects of valproic acid-labeled chitosan nanoparticles (VA-CN) on endogenous spinal cord neural stem cells (NSCs) following SCI and the underlying mechanisms involved remain to be elucidated. In this study, the VA-CN was constructed and the effects of VA-CN on NSCs were assessed in a rat model of SCI. We found VA-CN treatment promoted recovery of the tissue and locomotive function following SCI. Moreover, administration of VA-CN significantly enhanced neural stem cell proliferation and the expression levels of neurotrophic factors following SCI. Furthermore, administration of VA-CN led to a decrease in the number of microglia following SCI. In addition, VA-CN treatment significantly increased the Tuj 1- positive cells in the spinal cord of the SCI rats, suggesting that VA-CN could enhance the differentiation of NSCs following SCI. In conclusion, these results demonstrated that VA-CN could improve the functional and histological recovery through promoting the proliferation and differentiation of NSCs following SCI, which would provide a newly potential therapeutic manner for the treatment of SCI.
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Affiliation(s)
- Dimin Wang
- School of Medicine, Zhejiang University, Hangzhou, China
- College of Basic Medical Sciences, Second Military Medical University, Shanghai, China
| | - Kai Wang
- Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Zhenlei Liu
- Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Zonglin Wang
- College of Basic Medical Sciences, Second Military Medical University, Shanghai, China
| | - Hao Wu
- Department of Neurosurgery, Xuanwu Hospital of Capital Medical University, Beijing, China.
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Sun Z, Zhou S, Wang W, Zou D, Li W. Differences in standing and sitting spinopelvic sagittal alignment for patients with posterior lumbar fusion: important considerations for the changes of unfused adjacent segments lordosis. BMC Musculoskelet Disord 2020; 21:760. [PMID: 33208130 PMCID: PMC7677842 DOI: 10.1186/s12891-020-03777-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/05/2020] [Indexed: 12/04/2022] Open
Abstract
Objective This study aimed to describe the changes in spinopelvic sagittal alignment in the sitting position after posterior lumbar fusion, and to identify the factors influencing unfused adjacent segment lordosis. Methods Consecutive patients with lumbar degenerative disease who underwent posterior lumbar interbody fusion between December 2010 and April 2012 were recruited. Lateral full spine radiographs were obtained in the standing, erect sitting, and natural sitting positions. Spinopelvic parameters were measured preoperatively and at the final follow-up. Results The data of 63 patients were analyzed in this study. The average age was 61.6 ± 11.0 years. When changing from standing to sitting at the final follow-up, all spinopelvic sagittal parameters with the exceptions of pelvic incidence and thoracic kyphosis were significantly altered. The most noticeable changes occurred in the natural sitting position, with the spine slumped toward achieving a C-shaped sagittal profile. Multiple linear regression analysis revealed that when changing to a natural sitting position, age and fusion levels reflected the changes in lumbar lordosis (ΔLL), age and lumbosacral fusion reflected the changes in upper residual lordosis (ΔURL). Conclusion The most noticeable changes in spinopelvic sagittal alignment occurred in the natural sitting position after lumbar fusion. Age, fusion levels, and lumbosacral fusion significantly influenced the differences in LL and URL between the standing and natural sitting position. These characteristics should be fully considered when planning spinal realignment surgery and investigating the etiological factors of junctional complications.
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Affiliation(s)
- Zhuoran Sun
- Orthopaedic Department of Peking University Third Hospital, No 49. North Garden Street, HaiDian District, Beijing, 100191, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Siyu Zhou
- Orthopaedic Department of Peking University Third Hospital, No 49. North Garden Street, HaiDian District, Beijing, 100191, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Wei Wang
- Orthopaedic Department of Peking University Third Hospital, No 49. North Garden Street, HaiDian District, Beijing, 100191, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Da Zou
- Orthopaedic Department of Peking University Third Hospital, No 49. North Garden Street, HaiDian District, Beijing, 100191, China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Weishi Li
- Orthopaedic Department of Peking University Third Hospital, No 49. North Garden Street, HaiDian District, Beijing, 100191, China. .,Beijing Key Laboratory of Spinal Disease Research, Beijing, China. .,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China.
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Zhou S, Li W, Wang W, Zou D, Sun Z, Xu F, Du C, Li W. Sagittal Spinal and Pelvic Alignment in Middle-Aged and Older Men and Women in the Natural and Erect Sitting Positions: A Prospective Study in a Chinese Population. Med Sci Monit 2020; 26:e919441. [PMID: 31981456 PMCID: PMC6995246 DOI: 10.12659/msm.919441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background This prospective study aimed to compare the sagittal spinopelvic parameters in the erect and natural sitting positions in healthy middle-aged and older men and women in a Chinese population. Material/Methods Ninety healthy middle-aged and older men and women underwent lateral whole spinal radiography in the natural and erect sitting positions. The radiographic sagittal spinopelvic parameters were measured. They included the sagittal vertical axis (SVA), the T1 pelvic angle (TPA), the pelvic incidence (PI), the pelvic tilt (PT), the sacral slope (SS), thoracic kyphosis (TK), thoracolumbar kyphosis (TLK), the T1 slope (T1S), cervical lordosis (CL), and lumbar lordosis (LL). Results In the natural sitting position, LL decreased by 14.5°, TK and TLK increased by 3.2° and 2.5°, respectively, PT increased by 10.3°, T1S increased by 6.9°, and CL increased by 3.4° compared with the erect position. In the natural sitting position, the mean forward-moving SVA was 33.4 mm, and the C2–C7 SVA was 6.1 mm. Men had a larger LL and smaller PT than the women when sitting in the erect position, and a greater TK, T1S, and C2–C7 SVA than women when sitting in the natural position. Conclusions In the natural sitting position, a reduction in LL was associated with TK, SVA and PT increased, and there were differences between men and women. The characteristics of spinopelvic alignment in healthy older adults should be considered when planning corrective spinal surgery.
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Affiliation(s)
- Siyu Zhou
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Wei Li
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Wei Wang
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Da Zou
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Zhuoran Sun
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland)
| | - Fei Xu
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Chengbo Du
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland).,Peking University Health Science Center, Beijing, China (mainland)
| | - Weishi Li
- Orthopaedic Department, Peking University Third Hospital, Beijing, China (mainland)
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